Halomethanephosphonates



United HALOMETHANEPHOSPHONA'IES Marvin A. McCall and Richard L. McConnell, Kings-' port, Tenn., assignors to Eastman Kodak Company, Rochester, N.Y., a corporation of New Jersey No Drawing. Application May 29, 1953 Serial No. 358,548

7 Claims. (Cl. 260-461) This invention relates to a new and valuable class of organophosphorus compounds. More particularly, this invention relates to organophosphorus compounds of the general type:

"G x-om-P o (R).

wherein X represents halogen, R is alkyl, hydrogen, or halogen, and n is an integer 1 to 5.

These organophosphorus compounds are readily prepared by the reaction of molar proportions of the phenol with halomethanephosphonic acid dichloride in the presence or absence of such catalysts as magnesium chloride. For example, diphenylchloromethanephosphonate can be prepared substantially according to the reaction:

Example 1.-Bis-(2-chlor0phenyl) chloromethanephosphonate A mixture of 167.5 grams (1.0 mole) of chloromethanephosphonyl dichloride and 257.2 grams (2.0 moles) of o-chlorophenol was heated at reflux for eight hours. The apparatus consisted of a round bottom flask and a condenser equipped with a drying tube to protect the reaction mixture from atmospheric moisture. After the initial heating period of eight hours, the reaction mixture was cooled and slowly reheated to reflux under reduced pressure (10-15 mm.) for three to four hours to remove the last traces of hydrogen chloride and thus complete the reaction. The reaction mixture was next 2,900,405 Patented Aug. 18, 1959 fractionally distilled under reduced pressure, whereby 307 grams (87.5% of the theoretical yield) of product was obtained. The water-white liquid product (n 1.5752) boiled at 214-2l6 C. at 3.0 mm. pressure. The quantitative analysis of the product gave 44.72% carbon, 3 .03% hydrogen, 9.05% phosphorus, and 29.04% chlorme.

Example 2.-Bis(4-chlor0phenyl) chloromethanephosphonate Para-ehlorophenol (257.2 grams) was reacted with chloromethanephosphonyl dichloride (167.5 grams) in the same manner as described in Example 1. The liquid product obtained (11 1.5741) boiled at 214-216 C. at 2.5 mm. Quantitative analysis of the product gave 44.10% carbon, 3.00% hydrogen, 8.71% phosphorus.

Example 3.-Bis-(2,4-dichlor0phenyl) chloromethanephosphonate 2,4-dichlorophenol (32.6 grams) was reacted with chloromethanephosphonyl dichloride (16.75 grams) in the same manner as described in Example 1. The liquid product obtained (11;, 1.5898) boiled at 244-245 C. at 3.8 mm. A quantitative analysis of the product indicated 37.06% carbon, 2.07% hydrogen, 7.50% phosphorus.

Example 4.-Bis-(2-br0m0phenyl) chloromethanephosphonate CICHa-P=O Ortho-bromophenol (346 grams) was reacted with chloromethanephosphonyl dichloride (167.5 grams) in the same manner as described in Example 1. The product obtained boiled at 222-224 at 2.0 mm.

Example 5.-Diphenyl chloramethanephosphonate Q (EIGH -P 0 Phenol (188.2 grams) was reacted with chloromethanephosphonyl dichloride (167.5 grams) in the same manner as described in Example 1. The product boiled at 1489 at 1.7 mm.

3 4 Example 6.-Bis-(3,4-dimetlzylphenyl) chloromethane- 3. New compounds according to claim 1 where R is phosphorzate chlorine.

CH3 4. The new compound bis-(Z-chlorophenyl) chloromethauephosphonate having the formula:

CH3 C1 GlCHr-P=O C1 CH; A mixture of 3,4-dimethylphenol (244.3 g.) was re acted with chloromethanephosphonyl dichloride (167.5

g.) in the manner described in Example 1. The product 5. The new compound bis-(4-chlorophenyl) chloroboiled at 162-164 C. at 2.6 mm. methanephosphonate having the formula: Example 7.Bis-(4-tert-butylphenyl) c/zloromethane- G 01 phosphonate C1CH-P O /O t-butyl OCl ClCHnP O 0t-butyl 6. The new compound bis-(2,4-dichlorophenyl) chloromethanephosphonate having the formula: A mixture of p-tert-butylphenol g.) was reacted with chloromethanephosphonyl dichloride (16.75 g.) in 25 0 the manner described in Example 1. The product boiled at 171-2 C. at 2.7 mm. 01

C1CH;P=O

Example 8.--Bis-(0ctylphenyl) chloromethanephospho- Cl iC1CHPP O 7. The new compound bis-(Z-bromophenyl) chloro- E methanephosphonate having the formula:

A mixture of 1,1,3,3-tetramethylbutylphenol (412.6 Br g.) was reacted with chloromethanephosphonyl dichlo- I ride (167.5 g.) in the manner described in Example 1. 0G The product was an extremely viscous oil which was not distilled. o10H,-1 =o We claim: 1. New compounds of the symmetrical formula: 0

O 01oH P= 0 2 n References Cited 1n the file of thls patent UNITED STATES PATENTS 2,682,522 Coover et al. June 29, 1954 wherein R is selected from a single member of the group consisting of alkyl, containing 1 to 8 carbon atoms, chlo- OTHER REFERENCES fine, bromine and i 1 to 2 Kabachnik et al.: Chem. Abst., vol. 42, page 4132 2. New compounds according to claim 1 where R is (1948)- alkyl, containing 1 to 8 arbo t Chem. Abst., vol. 45, pages 6570, 10191, 8444 (1952). 

1. NEW COMPOUNDS OF THE SYMMETRICAL FORMULA: 